Every tool here is calibrated to an actual election and preloaded with real polling — then handed to you as a set of sliders. Move the vote, watch the seats respond, exactly the way each country's system actually converts one into the other.
Beyond the seat math: what parties are actually promising, and a live tracker for by-elections happening right now.
Winner-take-all by district. Canada and the UK are pure first-past-the-post; Australia ranks every candidate and redistributes preferences until one clears 50%.
Germany's seats come almost entirely from national list share. Poland and Italy split the difference between district wins and proportional top-ups; France runs two full rounds of voting.
Four countries, four different answers to 'how proportional is proportional': compensatory seats, regional thresholds, and one system with no correction tier at all.
Spain's small provincial districts let regional parties punch above their national vote share; Austria's three-tier system converges on near-perfect proportionality anyway.
Six systems built around real, sometimes idiosyncratic thresholds — fixed minority seats, diaspora seats, and one legislature with a built-in leader's bonus.
House, Senate, and all 36 governorships up this cycle — each modelled against real competitiveness ratings rather than one national swing.
Quebec referendum on Sovereignty and Sovereignty-Association, Alberta Independence and Scotland
Scotland, Wales, and Northern Ireland each run their own legislature under its own electoral system — none of them plain first-past-the-post like Westminster. Each is calibrated to its real last election, including Northern Ireland's real STV transfer effects.
Each Australian state runs its own lower house on preferential single-member voting, just like the federal parliament — calibrated here to that state's real most recent election.
Every Canadian province's simulator as its own page — Ontario, Alberta, and Quebec use real riding-by-riding data (the map colours by each riding's own projected winner, not one tint); the rest use a calibrated province-wide model. All link back to the full Canada Election Projector.
Two-round majority-runoff presidential elections — move the first-round sliders and watch who qualifies for the runoff, then see how eliminated candidates' voters split between the two finalists, calibrated to reproduce each country's real result.
27 countries, one parliament — MEPs organise into transnational political groups rather than national blocs. Build coalitions, not just seat counts.
Every real past election for federal Canada, all ten provinces; browse the actual result, then rebuild it with your own numbers.
Every real past election for Germany, Australia, and much more — browse the actual result, then rebuild it with your own numbers.
About these tools. Each projector is calibrated against that country or jurisdiction's actual most recent election and preloaded with real polling. Where a system has real quirks — concentrated regional parties, coalition-negotiated single-member seats, thresholds, levelling seats, two-round run-offs — the model reflects that specific mechanism instead of reusing one generic curve.
None of these are official forecasts. They're built for exploring "what if" scenarios, not predicting real outcomes.